I am working on bringing a recent purchase back to life (2008 Big Bear 250). It was missing the choke starter assembly which I just received in the mail. I installed it but am not sure of how it functions. When I fully open the choke I don't see any movement inside the carb. I guess there are no choke plates. I have attached a pic of the throttle body at resting position. Can someone provide some input on how the choke plunger operates and how I can confirm that it is working. I appreciate any input.

 

Upon further research I think I figured out the answer to my question. See attached picture. Apparently this isn't a traditional choke it is considered an enricher. When the needle is pushed in it blocks excess fuel. When you pull the choke lever out it pulls the needle back and allows more fuel to be delivered. So if I don't have the plunger connected to the carb I am assuming it would always be running on choke. Please correct me of I am wrong...

 

"So if I don't have the plunger connected to the carb I am assuming it would always be running on choke."

No, it would suck a lot of air in through the hole where the plastic screw in cap and plunger shaft or cable should go, and probably not have enough vacuum left to suck any fuel through the needle hole.

 

I have an old school 1988 YFM225 I'm getting back into good running shape with my kid. The carb on it also has an "enricher" versus choke.

A choke (like on my old XR600) is called a choke because it's choking the air flow to enrich the fuel during a cold start. On the carbs you and I have on these wheelers, it's an enricher that's adding a jolt of fuel to the existing air flow volume in the carb.

Down in the bottom of the plunger in mine, it was covered in crud from fuel sitting for a long time, and I had to clean the plunger off and clear the fuel passage really, really well to get it to idle at all without back firing through the carb. It took awhile but was worth it.

 

Correct, you won't see any movement. To verify movement, remove the cable/mechaism from carb, move choke cable to full choke position. You will see the mechanism being pull toward the cable. Take the cable to the full off position, the mechanism will extend outward. It is an enricher, however, most still refer to it as a choke. Enrichers increase idle speed, the "old" style chokes do not. Its always easier to install with the choke cable in the full "on" position. There is an adjustment for the enricher...the choke cable its self but...in most cases its best to leave the cable adusted to as short as length as possible. This limits the "throw" however, bascially ensures its in the full off postion when cable is in the full off position. Hope this helped.